Tag Archives: ratio

Wanted, Mathematicians for an Important but Difficult Task

By Art Duval, Contributing Editor, University of Texas at El Paso; Kristin Umland, Associate Professor, Department of Mathematics and Statistics, University of New Mexico (on leave), and Vice President for Content Development, Illustrative Mathematics; James J. Madden, The Patricia Hewlett … Continue reading

Posted in K-12 Education | Tagged , , | 10 Comments

Proportionality Confusion

By Dick Stanley, Professional Development Program, University of California at Berkeley The notion of one quantity being proportional to another is certainly a very basic part of an understanding of mathematics and of its applications, from middle school through calculus … Continue reading

Posted in Classroom Practices | Tagged , , | 16 Comments